日历控件,为了在自己的程序中随时得到一个日期所写的

只使用了最简的组件,JLabel和JPanel.所以有点丑陋。但是使用方便，在程序的任何部分只要使用String ss = new datePicker().getTheDay();当关闭窗口，或者在日期上

DoubleClick,就会得到日期。

import java.awt.Color;

import java.awt.event.MouseAdapter;


import java.awt.event.MouseEvent;

import java.awt.event.MouseListener;

import java.awt.event.MouseMotionListener;

import java.awt.event.WindowEvent;

import java.awt.event.WindowListener;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Date;

import javax.swing.JTextField;

import javax.swing.BorderFactory;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

public class datePicker extends JFrame{

/**

*

*/

private static final long serialVersionUID = 1L;

private SimpleDateFormat mft=new SimpleDateFormat("yyyy-MM-dd");

private int year=0,month=0,day=0;

private final JLabel currentday;

private String today = mft.format(new Date());

private final JPanel body = new JPanel();

private final JLabel bott = new JLabel();

private final ArrayList<JLabel> lm = new ArrayList<JLabel>();

private Calendar cal = Calendar.getInstance();

private Calendar daycal = Calendar.getInstance();

private int currLabel=0,tday = 0,sday = 0;

private final int tyear,tmonth,thisday;

private final int[] dayofmonth = {31,28,31,30,31,30,31,31,30,31,30,31};

private boolean notStop = true;

public datePicker(JTextField jt){

setSize(240,240);

setVisible(true);

final JPanel contp = new JPanel();

setContentPane(contp);

this.setDefaultCloseOperation(EXIT_ON_CLOSE);

contp.setLayout(null);

final JPanel header = new JPanel();

body.setLayout(null);

header.setBounds(0, 0, 240, 25);

header.setBackground(Color.LIGHT_GRAY);

header.setLayout(null);

contp.add(header);

try{

year = Integer.parseInt(today.substring(0, 4));

month = Integer.parseInt(today.substring(5,7));

day = Integer.parseInt(today.substring(8,10));

}catch(Exception e){

}

tyear = year;

tmonth = month;

thisday = day;

final JLabel pyear = new JLabel("<<",JLabel.CENTER);

final JLabel pmonth = new JLabel("<",JLabel.CENTER);

final JLabel nmonth = new JLabel(">",JLabel.CENTER);

final JLabel nyear = new JLabel(">>",JLabel.CENTER);

currentday = new JLabel(year + " - " + (month < 10 ? 0 : "") + month,JLabel.CENTER);

final JLabel weektitle = new JLabel("Sun Mon Tue Wed Thr Fri Sat",JLabel.CENTER);

contp.add(weektitle);

contp.add(body);

contp.add(bott);

bott.setBounds(10, 175, 150, 20);

body.setBounds(0, 50, 221, 120);

for (int i = 0;i<42;i++){

lm.add(new JLabel(i + "",JLabel.CENTER));

body.add(lm.get(lm.size() - 1));

lm.get(lm.size() -1).setBounds((i % 7) * 31 + 5 , (i / 7) * 20, 31, 15);

}

header.add(pyear);

header.add(pmonth);

header.add(nyear);

header.add(nmonth);

header.add(currentday);

pyear.setBounds(0, 0, 40, 20);

pmonth.setBounds(40, 0, 15, 20);

currentday.setBounds(70, 0, 80, 20);

nmonth.setBounds(170, 0, 15, 20);

nyear.setBounds(185, 0, 40, 20);

weektitle.setBounds(0, 30, 220, 20);

pyear.addMouseListener(new myMouseListener(pyear,-12));

pmonth.addMouseListener(new myMouseListener(pmonth,-1));

nyear.addMouseListener(new myMouseListener(nyear,12));

nmonth.addMouseListener(new myMouseListener(nmonth,1));

body.addMouseMotionListener(new MouseMotionListener(){

@Override

public void mouseDragged(MouseEvent arg0) {}

@Override

public void mouseMoved(MouseEvent arg0) {

if (arg0.getX() < 5 || arg0.getY() > 120) return;

if (currLabel != tday && currLabel != sday) lm.get(currLabel).setBorder(null);

if ((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31) == tday) return;

currLabel = (arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31);

if (currLabel != sday) lm.get((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31)).setBorder(BorderFactory.createLineBorder(Color.red));

}

});

body.addMouseListener(new MouseListener(){

@Override

public void mouseClicked(MouseEvent arg0) {

if (arg0.getX() < 5 || arg0.getY() > 120) return;

lm.get(sday).setBorder(null);

lm.get(sday).setOpaque(false);

lm.get(sday).setBackground(null);

lm.get((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31)).setBorder(BorderFactory.createLineBorder(Color.green));

lm.get((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31)).setBackground(Color.gray.brighter());

lm.get((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31)).setOpaque(true);

sday = ((arg0.getY() / 20) * 7 + ((arg0.getX() -5) / 31));

if (sday < 7 && lm.get(sday).getForeground().equals(Color.gray.brighter())){

if (month == 1){

bott.setText((year - 1) + " - 12 - " + lm.get(sday).getText() );

}else

bott.setText(year + " - " + ((month - 1) < 10 ? 0 : "") + (month - 1) +" - " + lm.get(sday).getText() );

}

if (sday > 24 && lm.get(sday).getForeground().equals(Color.gray.brighter())){

if (month == 12){

bott.setText((year + 1) + " - 01 - " + lm.get(sday).getText() );

}else

bott.setText(year + " - " + ((month + 1) < 10 ? 0 : "") + (month + 1) +" - " + (lm.get(sday).getText().length() == 1 ? 0 : "") + lm.get(sday).getText());

}

if (lm.get(sday).getForeground().equals(Color.black))

bott.setText(year + " - " + ((month) < 10 ? 0 : "") + (month) +" - " + (lm.get(sday).getText().length() == 1 ? 0 : "") + lm.get(sday).getText());

notStop = false;

if (arg0.getClickCount() == 2) setVisible(false);

}

@Override

public void mouseEntered(MouseEvent arg0) {}

@Override

public void mouseExited(MouseEvent arg0) {

if (currLabel == tday || currLabel == sday) return;

lm.get(currLabel).setBorder(null);

}

@Override

public void mousePressed(MouseEvent arg0) {}

@Override

public void mouseReleased(MouseEvent arg0) {}

});

updateDate();

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setBackground(Color.gray);

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setOpaque(true);

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setBorder(new EdgeBorder(true,true,true,true,1,Color.BLUE.brighter(),2,true));

tday = ((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0)));

bott.setText(year + " - " + ((month) < 10 ? 0 : "") + (month) +" - " + ((day) < 10 ? 0 : "") + day);

this.addWindowListener(new WindowListener(){

@Override

public void windowActivated(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowClosed(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowClosing(WindowEvent arg0) {

// TODO Auto-generated method stub

jt.setText(bott.getText());

}

@Override

public void windowDeactivated(WindowEvent arg0) {

// TODO Auto-generated method stub

jt.setText(bott.getText());

}

@Override

public void windowDeiconified(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowIconified(WindowEvent arg0) {

// TODO Auto-generated method stub

}

@Override

public void windowOpened(WindowEvent arg0) {

// TODO Auto-generated method stub

}

});

}

private String getTheDay(){

while (notStop){try {

Thread.sleep(100);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}}

return bott.getText();

}

private void updateDate(){

try {

daycal.setTime(mft.parse(year + "-" + (month < 10 ? 0 : "") + month + "-01"));

} catch (ParseException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

int day = getDayOfMonth(month > 1 ? year : year -1,month > 1 ? month - 1: 12);

int cday = getDayOfMonth(year,month);

int fday = daycal.get(Calendar.DAY_OF_WEEK);

int d1 = 1;

for (int i = 0;i < 42;i++){

if (((i < fday -1) && fday > 1) || (fday == 1) && i < 7){

((JLabel)(lm.get(i))).setForeground(Color.gray.brighter());

if (fday > 1) ((JLabel)(lm.get(i))).setText((day - fday + i + 2) + "");

if (fday == 1) ((JLabel)(lm.get(i))).setText((day - 7 + i + 1) + "");

}else

if (d1 < cday + 1)

{

((JLabel)(lm.get(i))).setText((d1 ++) + "");

((JLabel)(lm.get(i))).setForeground(Color.black);

}else

{

((JLabel)(lm.get(i))).setForeground(Color.gray.brighter());

((JLabel)(lm.get(i))).setText((d1++ - cday) + "");

}

}

}

private boolean isLeapYear(int year){

return (year%4==0&&year%100!=0)||year%400==0;

}

private int getDayOfMonth(int year,int month){

return isLeapYear(year) && month == 1 ? 29 : dayofmonth[month - 1];

}

final class myMouseListener extends MouseAdapter{

JLabel label;

int amonth;

public myMouseListener(final JLabel label,int month){

this.label = label;

this.amonth = month;

}

public void mouseEntered(java.awt.event.MouseEvent me) {

label.setCursor(new java.awt.Cursor(java.awt.Cursor.HAND_CURSOR));

label.setForeground(java.awt.Color.RED);

}

public void mouseExited(java.awt.event.MouseEvent me) {

label.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));

label.setForeground(java.awt.Color.BLACK);

}

public void mousePressed(java.awt.event.MouseEvent me) {

label.setForeground(java.awt.Color.WHITE);

lm.get(day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1).setOpaque(false);

year = month + this.amonth <= 0 ? year-1 : (month + this.amonth > 12 ? year+1 : year);

month = (month + this.amonth == 0 ? 12 : (month + this.amonth == 13) ? 1 : month + (this.amonth == -1 || this.amonth == 1 ? this.amonth : 0));

currentday.setText(year + " - " + (month < 10 ? 0 : "") + month);

if (year == tyear && month == tmonth)

try {

day = thisday;

cal.setTime(mft.parse(year + "-" + (month < 10 ? 0 : "") + month + "-" + (day < 10 ? 0 :"") + day));

} catch (ParseException e) {

//

e.printStackTrace();

}

else

try {

day = 1;

cal.setTime(mft.parse(year + "-" + (month < 10 ? 0 : "") + month + "-01"));

} catch (ParseException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

lm.get(tday).setOpaque(false);

lm.get(tday).setBorder(null);

lm.get(sday).setBorder(null);

lm.get(sday).setOpaque(false);

lm.get(sday).setBackground(null);

if (year == tyear && month == tmonth){

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setBackground(Color.gray);

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setOpaque(true);

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setBorder(new EdgeBorder(true,true,true,true,1,Color.BLUE.brighter(),2,true));

}else{

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setBackground(Color.gray);

lm.get((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0))).setOpaque(true);

}

tday = ((day -1 + cal.get(Calendar.DAY_OF_WEEK) - 1 + (cal.get(Calendar.DAY_OF_WEEK) == 1 ? 7 : 0)));

updateDate();

}

public void mouseReleased(java.awt.event.MouseEvent me) {

label.setForeground(java.awt.Color.BLACK);

}

}

public static void main(String[] args){

String ss = new datePicker().getTheDay();

System.out.print(ss);

}

}